atomic number 97

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Noun1.atomic number 97 - a radioactive transuranic elementatomic number 97 - a radioactive transuranic element; discovered by bombarding americium with helium
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
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References in periodicals archive ?
Berkelium, atomic number 97, is one of the rare artificially produced elements; the Russian team was able to obtain just 22 milligrams of it from Oak Ridge.